body {
    background-color: #1a8e8c;
}

.content-main {
    background-color: transparent;
}
.card-body,.card-register{
    width: 500px;
}
.avatar-preview{
    width: 88px;
    height: 88px;
    border: 1px solid silver;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center center;
    margin-top: 4px;
}